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| All Patents in class 60/621 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 161,454 | Mar. 30, 1875 | J. Taggart | Air and Gas Engines | ||
| 222,467 | Dec. 09, 1879 | G.W. Daimler | Gas-Motor Engine | ||
 | 348,999 | Sep. 14, 1886 | J.F. Place | Gas Engine | |
| 571,966 | Nov. 24, 1896 | M. Blakey | Operation of Gas Engines | ||
| 580,172 | Apr. 06, 1897 | M. Blakey | Gas or Other Explsive Engine | ||
| 586,409 | Jul. 13, 1897 | E.P. Woillard | Gas or Vapor Engine | ||
| 651,062 | Jun. 05, 1900 | A. Adamson | Internal Combustion Engine | ||
| 715,008 | Dec. 02, 1902 | C.A. Braden | Steam Explosive Engine | ||